PCIe 2.0 brings 125W to your card

The key thing about PCIe 2.0 is that you can get a bit more
power from the PCIe slot. The current PCIe 1 and 1.1 specification will limit
you to 75W and it is quite obvious that you will need even more in the future.

Cards such as Geforce 8800 GTX and Radeon HD 2900XT needs
the whole 75W from the PCIe port and have two power plug that can bring total
of 225W to the graphic card. With PCIe 2.0 specification you will be able to
add even more power to your greedy graphic card and this is what the future
brings and needs.

PCIe 2.0 chipsets will be launched September to October time
and RD790 and Intel’s X38 are the first two to bring the PCIe 2.0 to AMD and
Intel platform.